Originally Posted by Jeffblue

Theres 3 main trims to this car.
1. Base (cloth seats, no bose stereo)
2. Touring (Leather Seats, Bose Headunit and speakers)
3. Nismo

The following are options that can be added to either the Base or Touring model
1. Sports package (Limited Slip Differential, Akebono BBK, Rays 19" wheels, SRM)
2. Navigation
3. Aluminum kick plates, floor mats, other random little options

so YES a 370z with cloth seats and no bose headunit with a BBK and Rays wheels is a Base 370z, in the sense that it is not a touring package. If you look on KBB the choices are Base, Touring and Nismo